|本期目录/Table of Contents|

[1]宗琦,王浩,汪海波.碳化砂浆轴向冲击动态力学特性与破碎形态分析[J].中国安全生产科学技术,2020,16(6):153-159.[doi:10.11731/j.issn.1673-193x.2020.06.025]
　ZONG Qi,WANG Hao,WANG Haibo.Analysis on dynamic mechanical characteristics and fracture morphology of carbonated mortar under axial impact[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(6):153-159.[doi:10.11731/j.issn.1673-193x.2020.06.025]
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碳化砂浆轴向冲击动态力学特性与破碎形态分析
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年6期
页码:
153-159
栏目:
职业安全卫生管理与技术
出版日期:
2020-06-30

文章信息/Info

Title:
Analysis on dynamic mechanical characteristics and fracture morphology of carbonated mortar under axial impact
文章编号:
1673-193X(2020)-06-0153-07
作者:
宗琦; 王浩; 汪海波
（安徽理工大学 土木建筑学院，安徽 淮南 232001）
Author(s):
ZONG Qi;  WANG Hao;  WANG Haibo
(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan Anhui 232001,China)
关键词:
砂浆; 碳化龄期; 动态力学特性; SHPB
Keywords:
carbonation age;  mortar;  dynamic mechanical characteristics;  split Hopkinson pressure bar (SHPB)
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2020.06.025
文献标志码:
A
摘要:
为保证长期使用砂浆在动载作用下的安全性，采用非金属超声波检测仪测量不同碳化龄期试件的纵波波速，引入碳化增强因子η表征碳化深度大小，并利用直径50 mm变截面分离式Hopkinson 压杆试验装置开展不同碳化龄期砂浆冲击动态压缩试验，研究碳化后砂浆的动态力学特性与破碎形态，分析砂浆动态应力—应变曲线、峰值应力和破碎形态随碳化龄期变化规律。结果表明：随着碳化龄期的增长，试件波速呈增大趋势，碳化增强因子η增大，碳化深度增加；碳化龄期相同时，砂浆的动态峰值应力、峰值应变都随着冲击气压的增大而增大；冲击气压相同时，砂浆的动态峰值应力随着碳化龄期的增长而增加；试件的破坏形态主要呈现为压碎破坏与劈裂拉伸。
Abstract:
In order to ensure the safety of the longterm used mortar under the dynamic load,the nonmetallic ultrasonic detector was used to measure the longitudinal wave velocity of specimens with different carbonization ages,and the carbonization enhancement factor η was introduced to reflect the size of carbonization depth,and the variable crosssection split Hopkinson pressure bar (SHPB) test device with the diameter of 50 mm was used to carry out the impact dynamic compression tests on the mortar with different carbonation ages.The dynamic mechanical properties and fracture morphology of mortar after carbonation were studied,and the change laws of dynamic stressstrain curve,peak stress and fracture morphology of mortar with the carbonation age were analyzed.The results showed that with the increase of carbonation age,the wave velocity of specimens increased,the carbonation enhancement factor η increased,and the carbonation depth increased.When the carbonation age was the same,both the dynamic peak stress and strain of mortar increased with the increase of impact air pressure.When the impact air pressure was the same,the dynamic peak stress of mortar increased with the increase of carbonation age.The failure morphology of specimens mainly presented as the crushing failure and splitting tension.

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备注/Memo

备注/Memo:
收稿日期： 2020-03-30
* 基金项目： 安徽省重点研究与开发计划项目（201904a07020081）；安徽省自然科学基金项目(2008085ME163)；安徽省高等学校自然科学研究项目（KJ2018A0074）
作者简介： 宗琦，博士，教授，主要研究方向为爆破工程、岩石动力学。
通信作者： 王浩，硕士研究生，主要研究方向为岩石冲击动力学。
更新日期/Last Update: 2020-07-07